Oblong master links are typically used at the end of rigging assemblies, and most often, they are used on one end only. They are called master links because in a traditional rigging assembly, the master link is on top, connecting directly to the crane hook while the rest of the sling hangs below it. These master links are extra strong, being made from Grade 120 alloy steel. They are ideal for use with Grade 120 chain and components, intended to make single leg assemblies (view specs below). Powder-coated blue with a 4:1 safety factor.